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Tablesum() to get totals do not work

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    #1

    Tablesum() to get totals do not work

    I still have problems with tablesum() a table to get its totals.
    I am attaching a sample DB. As you can see The sysntax in the field of the nameheader field called totused gives the value, during setup, in the actual form, does not show.
    The sysntax I am using in the form nameheader.dbf field totused is
    TABLESUM("nameitems.dbf","Id= " + QUOTE( Id_parent ) , "qtyused")

    The form is based in a set
    The id is in the nameheader.dbf
    The id_parent is the link in the nameitems.dbf
    qtyused is the field to use to total in the nameheader

    What is wrong with the syntax?
    Tags: None
    #2
    Re: Tablesum() to get totals do not work

    Mike

    I have attached your zip file revised.

    You were trying to use a calcualated field based on a child table to load the total quantity for that parent id. You needed to use a posting field rule in the child table to update the parent key everytime a new entry is made in the child table.

    Using the calculated field, you would have to recacl the calculated fields after each entry into the child table. With the posting that is done for you.

    Look at the field rules in the parent table "nameheader". I have changed the "totused" field from calculated to user entered. Then look at the field rules in the child table "nameitems". I have added a posting rule to the field "qtyused". It adds the qtyused from the child table to the totused field in the nameheader table to the record that has the same id and the parentid in the child table.

    Now when you update a record in the child browse, it immediately updates the totused field in the master (parent) table and shows that new totused in the field on the form.

    I have also checked the rule to undo on delete, so that if you delete a record from the child table, the master table totused field will also be updated to show the total after the delete.

    Tom

    Comment

      #3
      Re: Tablesum() to get totals do not work

      Originally posted by MikeData View Post
      I still have problems with tablesum() a table to get its totals.
      I am attaching a sample DB. As you can see The sysntax in the field of the nameheader field called totused gives the value, during setup, in the actual form, does not show.
      The sysntax I am using in the form nameheader.dbf field totused is
      TABLESUM("nameitems.dbf","Id= " + QUOTE( Id_parent ) , "qtyused")

      The form is based in a set
      The id is in the nameheader.dbf
      The id_parent is the link in the nameitems.dbf
      qtyused is the field to use to total in the nameheader

      What is wrong with the syntax?
      Or....another approach...

      Comment

        #4
        Re: Tablesum() to get totals do not work

        As you can see The sysntax in the field of the nameheader field called totused gives the value, during setup, in the actual form, does not show.
        When calculated fields are calculated.
        There can be only one.

        Comment

          #5
          Re: Tablesum() to get totals do not work

          Tom Thanks for the revised sample. I did apply the process to another DB and it does update the fiels, but only after is refresh or saved.
          Stan has given me an indication why the fields are not updated.

          Thanks Stan.
          This information has created more questions than answers. Here is a quote

          When Calculated Fields are Calculated
          Merely adding a field to a table and giving it a field rule calculation expression does not fill the field with values. A field rule does not calculate until one of three events occurs.
          � A record is added to the table
          � One of the fields in the calculation is changed or edited in a record
          � Run the Re-Evaluate rules function.
          Here is a quote from the manual:
          <TBL>.RECALC_CALCFIELDS()
          Syntax
          <TBL>.RECALC_CALCFIELDS()
          Description
          The <TBL>.RECALC_CALCFIELDS() method recalculates the calculated field in a table. The calculated fields in a table are defined in Field Rules. Normally, as you enter and edit records in a table, the calculated fields are automatically recalculated. However, if you modify an Alpha Five table outside Alpha Five (e.g. by using a program that can read Alpha Five�s .dbf files), or by running some Alpha Five Operation (such as a Posting Operation), the calculated fields are not updated.

          Above statements correspond with my case in my other DB, yet it does not address the issue that in the sample Tom revised, the data is update immediately. On either of the DBs, above function has not been called.

          There must be a setting somewhere either, turn on or turn off the updating, to account for the difference.

          Comment

            #6
            Re: Tablesum() to get totals do not work

            Mike,

            In your original sample database. Right click on the table in the control panel, Utilities, Recalc Calc Fields. Open your form and the totals display.

            Start a new record and enter some products and quantities. Move to the prior record and come back (saving the current record). Change the name in the parent record, the calc fields will display.

            Not sure why the calculation does not trigger on new record entry.
            There can be only one.

            Comment

              #7
              Re: Tablesum() to get totals do not work

              Stan, Thanks.
              That is the problem. If you try the sample Tom returned, you will see that the results are all correct.
              Make a change and the data is updated in the total of the header form.
              If I apply that process to other DBs, They do not update the same way, They save, but do not display immediately

              Comment

                #8
                Re: Tablesum() to get totals do not work

                The real question in my mind is why you want to store this information in the header table when it is easily derived at any time with a calculated field on a form or report. Done that way you don't have to worry about a field rule posting or a field rule calculation not being up to date.
                There can be only one.

                Comment

                  #9
                  Re: Tablesum() to get totals do not work

                  In the past applications I have not stored the values of the subtable. I have used calculated variables. I believed it was you who have help me in the past to do do it.
                  Yes you can use calculations, but in this case the values are going to be used over and over many times and I was trying to avoid the calculations so many times.
                  I am still confused as why in one application we can accomplish it and others no.

                  Stan, Thanks for the help.

                  Comment

                    #10
                    Re: Tablesum() to get totals do not work

                    Mike, perhaps your confusion can be explained if you show us how you implemented the solution in the other db's you mention... ?

                    Comment

                      #11
                      Re: Tablesum() to get totals do not work

                      Tom I did the same syntax as to the revised sample.
                      The difference was that I did not applied the refresh option.

                      I was getting ready to prepare the sample for another question and found the option of a screen refresh to the ONSAVE event of the nameitems browse.
                      I did apply that change to my other DB and it is getting close to my objective.
                      Thanks.

                      Comment

                        #12
                        Re: Tablesum() to get totals do not work

                        Mike

                        I have been away and just read the rest of the responses in the thread.

                        I had forgotten to tell you to look at the browse OnSave event where I placed the refresh display action scripting.

                        As you have found, you need to refresh the display of the browse which saves the record and resynchs the tables as well as updating the parentform to reflect the new total in the "totsused" field.

                        Tom Baker

                        Comment

                          #13
                          Re: Tablesum() to get totals do not work

                          Again thanks for all the help.
                          It is great.

                          Comment

                            #14
                            Re: Tablesum() to get totals do not work

                            I am trying to manipulate data in a query set. I start with a database called proposals and I do a query by date range and salesman’s name. I then count the records in the set. Next, I want to total the dollar total of the proposals for that salesperson during the period queried. I am having difficulty totaling the field called Amount in the query set. I do not understanding the syntax of TABLESUM. I must be missing some thing. Is there an alternate method of summing the field? Amount is not an indexed field, but it is a numeric field. Your help will be appreciated.

                            Comment

                              #15
                              Re: Tablesum() to get totals do not work

                              Experiment with AlphaSports until you have a feel for tablesum(). Use the interactive window and

                              Code:
                              ? tablesum("invoice_items",".T.","extension")
= 13988.04
? tablesum("invoice_items","invoice_number = '000006'","extension")
= 184.84

inv_num = "000006"
? tablesum("invoice_items","invoice_number = '"+inv_num+"'","extension") 
= 184.84
                              There can be only one.

                              Comment

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